Integrated circuit packages must also be impervious to D-particles.

　Métis said that D-particles have the same ability to pass through objects as hydrogen atoms. Even if hydrogen is stored in a metal tank, it will leak out of the tank before you know it. This phenomenon is called "permeation.

　Hydrogen atoms are so small that they may be able to pass through the gaps in metal crystals. The same thing is said to happen with D particles. Even if integrated circuits are made in a clean room, they will eventually fail unless the package that encloses and protects the semiconductors is devised.

　Métis has an idea for a possible solution to that, he says: solidifying D-particles and using them as a package, as in the D-particle fiber manufacturing equipment.

　Several generations have passed since the D particle enveloped the earth, or rather the solar system. During that time, integrated circuit manufacturing technology has become obsolete.

wastepaper

The factory and other buildings were demolished.

　Although books and records remained, it was difficult to reconstruct the technology of integrated circuits on that basis alone. This is because the engineers who were actually involved in the manufacturing process had died out, and no know-how remained.

　If we were to start, we would have to develop something like a simple calculator.

　Listening to Métis, I think only Alisa might have understood it completely. I understood 90% of what he said, but I've never seen an integrated circuit before, so I don't know anything about the packaging. And is it true that hydrogen can pass through metal?

As for the redevelopment of integrated circuits, I'll leave that aside because it will take time, but do you have any other ideas?"

I know this is not a use for the white magic stone, but a friend of mine, who started learning life magic at my suggestion, said that she wished there was a magic that could replace the umbrella.

　Chika came up with an idea that really seems like living magic.

I see, so you want to use it when it suddenly rains, although it's easy to make the D-particles form an umbrella: ......"

　We decided to use a raincoat with a hood, judging that an umbrella could be dangerous in windy conditions. The size of the raincoat is designed to change according to the body size.

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　That magic needs to be maintained for a long time, but I solved this problem by coating it with magic power. This "raincoat" magic was created in a short time, but it seems to be quite useful. The magic level that can be learned was reduced to "2," so many people will be able to use it.

　However, it is not yet complete. It must be tested to see what happens if you are holding a baby or carrying a load, etc.

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　Nagase, a Class A student, has finally recovered from his injuries sustained in the battle with Fenrir and has returned to Shibushi City. Upon entering the Adventurers' Guild, he went to report to the branch manager.

　When the Kondo branch manager saw Nagase's face, he asked about his physical condition.

I'm completely healed now. More importantly, have you made any progress on the Narukami dungeon?"

That's not the case at all," he said. Two of our main A-level players had gone to Kyoto."

　Nagase looks unhappy.

I heard he took down a basilisk zombie."

You must mean Mr. Grimm. The branch manager in Kyoto was very pleased. I heard that Nagase has also acquired a mythical magical weapon, which he has longed for."

　Nagase grins.

Yes, I finally got it. I'm going to dive into the Narukami dungeon and give it a try."

By the way, Nagase's ranking is 113th, thanks to his success in defeating Fenrir.

　Nagase looks dissatisfied.

I guess I didn't reach the hundredth place.

　After hearing about the Narukami dungeon from the branch manager, Nagase headed for the Narukami dungeon. He entered the dungeon and proceeded the shortest way to the tenth layer, stayed overnight in the middle boss room of the tenth layer, and then headed to the twelfth layer.

　I used the Heavenly Ten Grip Sword for the first time in the slug meadow on the tenth level. That magical weapon is a weapon with a long handle and a straight, beautiful sword blade.

　As he watches the swarm of running slugs rushing toward him, he holds the Tenjuguri Sword at the side of his body. From a stance called the side stance, he swings it out as if to reave them by pouring magic power into it.

　Of course, the running slugs were not within sword range. The sword blade of the Tenjugurigi-ken was swung out, and a slash flew from the blade. Similar to the "Sword Force" attack magic, a larger slashing blade cut more than a dozen running slugs in half at once.

　The running slug's weak point is the tiny brain in its head. In this case, it appears to have died because its head was detached from its body.

　Feeling satisfied with the response, Nagase stared at the Tenjushuguri Sword.

I like this one. It seems to be able to control the size and power of the flying slashes."

　Nagase annihilates a swarm of running slugs and proceeds through the slug meadow.

　After passing through the tenth layer and descending to the twelfth layer, Nagase used the Tenjuguri Sword to slay the sand giants here as well. Nagase nodded in satisfaction as he obtained one of the magic stone reactors.

　We went to the depths of the twelfth layer. There, he found a mountain made of rock and red clay. There is a hole near the top of that mountain.

That cave looks suspicious."

　Nagase used magic equipment magic to strengthen his muscles and ran up the mountain.

　Upon entering the cave, Nagase felt it was dark inside and took out a headlight and put it on his head. As he proceeded deeper into the cave, he encountered the Sogin Golem.

　The Sougin Golem, composed of sturdy metal, would normally be an opponent that could not be cut with a sword. However, Nagase, who had poured his magical power into the Tenjugurigi-ken, slashed it open. Nagase laughs with satisfaction and picks up the fallen magic stone.

　This cave is said to curve gently downward. After about an hour of progress, Nagase reaches a large door.

I hope this is the end of the line."

　When Nagase opened that door, he saw a vast city. The next thing he saw was the bear-headed inhabitants of War Bear. The entire area was a War Bear city.

What a mess," I thought to myself. A city of brown bears weighing 300 kilograms and disguised as humans? It would be foolhardy of us to rush in here.

　Nagase, feeling that he did not have enough information, decided to turn back.